From ALT Linux Wiki
Writing hybrid ISO images to boot media
It's not recommended to use UNetbootin, Rufus or UltraISO as these are too "smart" and actually cripple the resulting media to barely bootable or even unbootable state.
It is recommended to use the following utilities.
- Linux: K3b and similar frontends to cdrecord/growisofs
- Windows: Nero BurningROM or similar
USB Flash drives
- Linux: SUSE Studio Imagewriter (imagewriter package) or direct dd use
- Windows: Win32 Disk Imager, HDD Raw Copy Tool and the likes
Please do care to doublecheck and select the proper target device or your hard drive might get overwritten!